Alexander "the Great" (mass murderer) began his conquests at the age of 20 and had conquered the largest empire the world had ever seen at the age of 26.
Hannibal was in his 20s when he lead the Carthagian campaign against Rome.
Napoleon began at 26 and had conquered half of Europe at 35.
War being a business of old men sending young men to die is a modern thing.
That's very backwards when you consider one of the things keeping WW3 from starting for so long was the continued existence of WWII veterans and the citizens of the countries they came from who sacrificed everything.
If we only still had a few hundred million of them still alive, it's the proven most effective thing anybody has ever had to prevent mindless war and/or nuclear war.
And they would all be between 100 and 150 years old by now.
Now that's elderly, and if the human race were to have been blessed with such a miracle it would be so good for them to continue teaching their lessons to those who never had the chance, and are just not mature enough to have any other clue yet.
Hannibal was in his 20s when he lead the Carthagian campaign against Rome.
Napoleon began at 26 and had conquered half of Europe at 35.
War being a business of old men sending young men to die is a modern thing.